1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
horrorfan [7]
3 years ago
8

According to an on-line dating website, 20% of the couples who are in committed relationships met on-line. Suppose you know 15 c

ouples in a committed relationship. What is the expected number of couples who met on-line? What is the standard deviation?
Mathematics
1 answer:
tester [92]3 years ago
4 0
15/x = 20/100
15*100 = 20*x
1500 = 20x
1500/20 = 20x/20
75 = x

15/75 = 20/100

the expected number of couples who met online is 75
You might be interested in
Reduce the fraction -20t^5 u^2 v^3 over 48t^7 u^4 v
timofeeve [1]
.........................................................

5 0
3 years ago
If p → q is true, then ~ p → ~ q is __________ true. always sometimes never
Yuliya22 [10]

Answer:

The correct answer is Never

6 0
3 years ago
Graph the solution set
antiseptic1488 [7]

Answer:

Graph by first drawing a horizontal line at 3 on the y axis. Anything below this line falls into the y is less than or equal to 3 range. Draw a vertical line at negative 2 on the x axis. This represents x > -2. The next one is a slanted line, so it'll be trickier to graph. If using a graph of 10 - 10, graph from (-8, -10) to (10, 8). If using a graph of 20 - 20, graph from (-18, -20) to (20, 18). As seen in the graph, anything to the upper left of this line is included.

The true inclusion is where all the ranges intersect. Be sure to color this the darkest or with a special pattern.

5 0
3 years ago
X/3 + 4<6 pls help will mark branliest
Agata [3.3K]

Answer:

x < 6

Step-by-step explanation:

\frac{x}{3}+4 < 6

Subtract 4 form both sides

\frac{x}{3}

Multiply both sides by 3

x < 2*3\\\\x < 6

3 0
3 years ago
Read 2 more answers
Recording the number of pages in each book in one book shelf in a library is an example of measuring a _____.
Wewaii [24]
B because why can’t it ! Heheehebe. She herb
3 0
3 years ago
Other questions:
  • What is 0.8 repeating as a fraction
    13·2 answers
  • A jar lid has diameter of 42 millimeters.What is the circumference of the lid
    9·1 answer
  • Rafael is taking a test that contains a section of 12 true-false questions. how many of the possible groups of answers to these
    9·1 answer
  • 15= -45 + 5n solve for n
    5·2 answers
  • An isometry is a transformation that preserves?
    13·1 answer
  • A box of candy has 21 pieces total of 7 of the pieces are cherry flavored what is the ratio of other flavors to the cherry flavo
    5·2 answers
  • What is the value of d/dx (6/x^4 + 1/x^2) at x = -1 ?
    14·1 answer
  • Solve
    8·1 answer
  • Is 1 1/30 more or less then 1 1/2 gallons
    6·2 answers
  • A civil engineer is mapping the overhead clearance of his family’s property on a coordinate grid. The ground is represented by t
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!